<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style lang="css">
    @import url("https://fonts.googleapis.com/css?family=Lora:400,400i,700");

    body {
      display: flex;
      flex-direction: column;
      height: 100vh;
      justify-content: center;
      align-items: center;
      background-image: linear-gradient(rgba(16, 16, 16, 0.8), rgba(16, 16, 16, 0.8)), url(https://i.loli.net/2019/10/18/buDT4YS6zUMfHst.jpg);
      background-size: cover;
    }

    p {
      margin: 0 9em;
      font-size: 2em;
      font-weight: 600;
    }

    .landIn {
      display: flex;
      flex-wrap: wrap;
      line-height: 1.8;
      color: white;
      font-family: Lora, serif;
      white-space: pre;
    }

    .landIn span {
      animation: landIn 0.8s ease-out both;
    }

    @keyframes landIn {
      from {
        opacity: 0;
        transform: translateY(-20%);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
  </style>
</head>

<body>
  <p class="landIn">Ano hi watashitachi mada shiranai no Fushigi no monogatari desu.</p>
</body>
<script>
  var landInTexts = document.querySelectorAll(".landIn");
  landInTexts.forEach(function (landInText)
  {
    var letters = landInText.textContent.split("");
    landInText.textContent = "";
    letters.forEach(function (letter, i)
    {
      var span = document.createElement("span");
      span.textContent = letter;
      span.style.animationDelay = i * 0.05 + "s";
      landInText.append(span);
    });
  });
</script>

</html>